CN219336675U

CN219336675U - Servo knurling machine

Info

Publication number: CN219336675U
Application number: CN202222564034.6U
Authority: CN
Inventors: 王永伟
Original assignee: Elektra Industrial China Co Ltd
Current assignee: Elektra Industrial China Co Ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-07-14
Anticipated expiration: 2032-09-27

Abstract

The utility model discloses a servo knurling machine, which comprises a machine table, wherein a knurling assembly is movably arranged on the machine table and comprises two knurling mechanisms and an adjusting mechanism, wherein the distance between the two knurling mechanisms is limited to be equal to half of the machining length of a workpiece; the moving assembly comprises a servo motor and a screw rod, wherein the screw rod is arranged along the X-axis direction of the machine table and is in threaded connection with a first base of the knurling mechanism, and the knurling assembly is driven to reciprocate; the rotating assembly comprises a main shaft head, a round rod type workpiece clamped by the main shaft head penetrates through the two knurling mechanisms, and the round rod type workpiece is rotatably placed on the knurling mechanisms. The utility model has the advantages that: the traditional precession processing mode is subjected to action decomposition, the servo motor is used for providing feeding, the round rod type workpiece only needs to rotate, the situation of movement is effectively prevented, and the generation of defective products is reduced; the two knurling wheels and the two support bearings limit the round rod type workpiece to the through holes formed by surrounding the round rod type workpiece and the round rod type workpiece, so that the round rod type workpiece is prevented from generating eccentricity, and the yield is improved.

Description

Servo knurling machine

Technical Field

The utility model belongs to the technical field of machine manufacturing, and particularly relates to a servo knurling machine.

Background

In the past, knurling on the surface of pipe material is processed on ordinary car and numerical control lathe, and wherein equipment cost is high and inefficiency, and especially the length of bar, the pipe material of being processed is limited to some extent, and longer bar, pipe material can't process, need divide into several sections and process, and extremely inconvenient, a mechanical device is needed to process longer bar, pipe material once entirely in urgent need.

The traditional knurling machine is used for knurling a workpiece to be knurled in a precession mode. The following disadvantages occur in this way of processing: firstly, knurling is carried out in a precession mode, so that a workpiece is easy to move, and a defective product is formed; secondly, traditional knurling machine extrudes the feeding through two compression rollers to the work piece, and this kind of feeding mode easily leads to the work piece to appear eccentric in the advancing process, and then leads to the production of substandard product, and in sum, traditional knurling machine easily reduces the yields.

In order to solve the problems, a servo knurling machine is designed to solve the important technical problems to be solved by the person skilled in the art.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a servo knurling machine.

The aim of the utility model is achieved by the following technical scheme:

servo knurling machine, comprising

A machine platform is arranged on the machine platform,

the knurling assembly is movably arranged on the machine table and comprises two knurling mechanisms and an adjusting mechanism for adjusting the distance between the two knurling mechanisms, wherein the adjusting mechanism limits the distance between the two knurling mechanisms to be equal to half of the machining length of a workpiece;

the moving assembly is positioned at one end of the knurling assembly and comprises a servo motor fixed on the machine table and a screw rod driven by the servo motor to rotate, and the screw rod is arranged along the X-axis direction of the machine table and is in threaded connection with the first base of the knurling mechanism so as to drive the knurling assembly to reciprocate;

the rotary assembly is positioned at the other end of the knurling assembly and comprises a main shaft head used for clamping a round rod-shaped workpiece and driving the round rod-shaped workpiece to rotate, the round rod-shaped workpiece clamped by the main shaft head passes through the two knurling mechanisms and has only rotary motion, and the round rod-shaped workpiece is placed on the knurling mechanisms.

Preferably, the knurling mechanism further comprises a supporting seat fixed on the first base, the top of the supporting seat is recessed downwards to form an arc-shaped groove, and the radian of the groove is consistent with the outer circumference radian of the round rod-shaped workpiece.

Preferably, the support seat is inserted with two support bearings which are arranged in parallel along the Y-axis direction, and the support bearings are positioned at two sides of the groove; the round rod type workpiece is positioned between the outer walls of the two support bearings.

Preferably, the knurling mechanism further comprises a lifting cylinder arranged above the supporting seat, and a cutter holder for mounting a hob is fixed on a cylinder shaft of the lifting cylinder; the free end of hobbing cutter is provided with two knurl wheels along Y axle direction parallel arrangement, the round bar type work piece is located two between the outer wall of knurl wheel, two the knurl wheel is simultaneously right the tangential force is applyed to the round bar type work piece, and two tangential forces counteract each other.

Preferably, the first base is further provided with an air cylinder mounting seat, the lifting air cylinder is fixed on the air cylinder mounting seat, and the air cylinder mounting seat is located on one side of the supporting seat.

Preferably, the machine is further provided with a centering piece, the centering piece comprises an air cylinder and a positioning head arranged at the free end of the air cylinder, the positioning head and the spindle head are coaxially arranged, and can always generate pressure on one end of the round rod type workpiece after moving along the X-axis direction, so that the round rod type workpiece is in butt joint with the spindle head in cooperation with the round rod type workpiece which is axially fixed.

Preferably, the centering piece is arranged on the second base, the screw rod penetrates through the second base, and the second base is fixed on the machine table.

Preferably, the screw rod penetrates through a screw rod mounting seat close to the moving assembly and is inserted into the screw rod mounting seat close to the rotating assembly.

Preferably, the adjusting mechanism comprises a limiting plate and a pulling plate; the limiting plate is inserted between the two first bases to limit the distance between the two knurling mechanisms and synchronously moves with the two knurling mechanisms; one end of the pulling plate is connected with one of the moving plates corresponding to the first base through bolts, a waist-shaped hole is formed in the other end of the pulling plate, and the bolts penetrate through the waist-shaped hole and are fixedly connected with the other moving plate corresponding to the first base.

Preferably, a main machine motor is fixed above the main shaft head, and the main machine motor is connected with the main shaft head through a conveying belt; the center shaft of the main shaft head is positioned above the screw rod, and the center shaft of the main shaft head is positioned above the groove of the supporting seat.

The technical scheme of the utility model has the advantages that:

the structure is simple, the traditional precession processing mode is subjected to action decomposition, the servo motor is used for providing feeding, the round rod type workpiece only needs to rotate, the condition of movement in the processing process is effectively prevented, and the generation of defective products is reduced;

the positioning is accurate, the round rod type workpiece is limited in a through hole formed by surrounding the round rod type workpiece and the round rod type workpiece through the two knurling wheels and the two supporting bearings, so that the round rod type workpiece is prevented from generating eccentricity in the processing process, and the yield is improved;

the stability is high, the sliding rail component prevents the hob from shaking in the lifting process, so that deviation is generated between the hob and the positioning of the round rod type workpiece, and the stability of the lifting process is improved; the positioning head always generates acting force on the far end of the round rod type workpiece, so that the round rod type workpiece is prevented from shaking in the rotating process, and the stability of the machining process is improved;

the distance between two adjacent knurling mechanisms can be adjusted, a limiting plate with the corresponding length matched with the distance is arranged in the distance, and finally the distance between the knurling mechanisms is fixed through a pulling plate; the telescopic length of the positioning head is adjusted through the centering piece so as to meet the positioning of round rod type workpieces with different lengths.

Drawings

Fig. 1: a perspective view of a preferred embodiment of the present utility model;

fig. 2: front view of preferred embodiment of the present utility model;

fig. 3: a top view of a preferred embodiment of the present utility model;

fig. 4: a side cross-sectional view of a preferred embodiment of the present utility model.

Detailed Description

The objects, advantages and features of the present utility model are illustrated and explained by the following non-limiting description of preferred embodiments. These embodiments are only typical examples of the technical scheme of the utility model, and all technical schemes formed by adopting equivalent substitution or equivalent transformation fall within the scope of the utility model.

In the description of the embodiments, it should be noted that the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in the specific orientation, and thus are not to be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the scheme, the direction approaching the operator is the near end, and the direction separating from the operator is the far end, with reference to the operator.

The utility model discloses a servo knurling machine, which comprises a machine 100, wherein two guide rails 101 which are parallel to each other and arranged along the X-axis direction are fixed on the machine 100, a group of sliding blocks are clamped on the guide rails 102, and a moving plate 102 is fixed on the top of each sliding block, namely, the moving plate 102 moves along the arrangement direction of the guide rails 101 through the sliding blocks. The upper surface of the moving plate 102 is fixed with a first base 111, and the knurling mechanism 11 is fixed on the first base 111, and the first base 111 moves together with the moving plate 102 along the setting direction of the guide rail 101 during the moving process of the moving plate 102.

The machine 100 is movably provided with a knurling assembly 1, and the knurling assembly 1 comprises at least two knurling mechanisms 11 and an adjusting mechanism 12 for adjusting the distance between the two knurling mechanisms 11. The adjusting mechanism 12 limits the distance between the two knurling mechanisms 11 to be equal to half of the machining length of a workpiece, namely, the machining distance and the machining time of each knurling mechanism 11 are shortened through the two knurling mechanisms 11, so that the working efficiency is improved; at the same time, the distance between the adjacent knurling mechanisms 11 is determined by the adjusting mechanism 12, and the synchronous movement of the adjacent knurling mechanisms 11 is ensured. In the present utility model, the number of the knurling mechanism 11 and the adjusting mechanism 12 is not limited, and may be increased or decreased according to actual use.

As shown in fig. 1, the adjustment mechanism 12 includes a limiting plate 121. The limiting plate 121 is inserted between the two first bases 111 to limit the distance between the two knurling mechanisms 11, and moves synchronously with the two knurling mechanisms 11. The length of the limiting plate 121 may be changed according to actual requirements, that is, the distance between two adjacent knurling mechanisms 11 may be adjusted by changing the limiting plates 121 with different lengths. For example, when the number of the knurling mechanisms 11 is two, the maximum distance between the two limiting plates 121 is defined to be half of the processing length of the workpiece; when the number of the knurling mechanisms 11 is three, the maximum distance between the three knurling mechanisms 11 is defined to be one third of the processing length of the workpiece by the two limiting plates 121 with equal lengths.

In order to prevent the limiting plate 121 from falling due to shaking during the moving process, the adjusting mechanism 12 further includes a pull plate 122, the length of the pull plate 122 is preferably 479mm±1mm, one end of the pull plate 122 is fixedly connected with one of the moving plates 102 corresponding to the first base 111 through a bolt, a waist-shaped hole 1220 is formed at the other end of the pull plate 122, and the bolt penetrates through the waist-shaped hole 1220 and is fixedly connected with the other moving plate 102 corresponding to the first base 111.

As shown in fig. 4, the knurling mechanism 11 further includes a supporting seat 112 fixed on the first base 111, where the top of the supporting seat 112 is recessed downward to form an arc-shaped groove 1120, and the radian of the groove 1120 is consistent with the outer Zhou Hudu of the round rod-shaped workpiece, that is, the round rod-shaped workpiece is placed in the groove 1120 of the supporting seat 112, and the groove 1120 provides support for the round rod-shaped workpiece. In order to reduce friction between the round rod type workpiece and the supporting seat 112 in the machining process, two supporting bearings 1121 arranged in parallel along the Y-axis direction are inserted into the supporting seat 112, and the supporting bearings 1121 are positioned on two sides of the groove 1120; the round rod-shaped workpiece is located between the outer walls of the two support bearings 1121, the two support bearings 1121 are driven to rotate by the rotating round rod-shaped workpiece, and the surface of the round rod-shaped workpiece is processed in the rotating process.

As shown in fig. 1 and 4, the knurling mechanism 11 further includes a lifting cylinder 1131 disposed above the support base 112, specifically, a cylinder mounting base 113 is disposed on the first base 111, the lifting cylinder 1131 is fixed on the cylinder mounting base 113, and the cylinder mounting base 113 is located on one side of the support base 112. A cutter holder 114 for mounting a hob 1141 is fixed on the cylinder shaft of the lifting cylinder 1131; the free end of hobbing cutter 1141 is provided with two knurl wheels along Y axle direction parallel arrangement, the round bar type work piece is located two between the outer wall of knurl wheel, when the round bar type work piece is rotatory, two the knurl wheel is also rotatory thereupon, and two the knurl wheel is simultaneously to the tangential force is applyed to the round bar type work piece, and two tangential force offset each other. Therefore, in the process of machining the round bar workpiece, the two knurling wheels and the two support bearings 1121 rotate simultaneously and are fixed between the two knurling wheels and the two support bearings, so that eccentricity is prevented, defective products are caused, and the yield is improved.

In order to prevent the hob 1141 located at the free end of the lifting cylinder 1131 from swinging during operation, and further cause deviation from positioning the round rod workpiece, the hob 114 and the cylinder mount 113 are connected by a slide rail assembly 1134, and the slide rail assembly 1134 includes a slide rail fixed on the inner side of the cylinder mount 113 and a slider clamped on the slide rail and reciprocally moving along the mounting direction of the slide rail. The tool post 114 is fixedly connected with the slider, and the slider moves synchronously with the tool post 114, that is, the stability of the hob 1141 in the moving process is enhanced by the sliding rail component 1134, and meanwhile, the sliding rail component 1134 plays a guiding role on the hob 1141.

One end of the knurling assembly 1 is provided with a moving assembly 2, the moving assembly 2 comprises a servo motor 21 fixed on the machine 100 and a screw rod 22 driven by the servo motor 21 to rotate, the screw rod 22 penetrates through a screw rod mounting seat 220 close to the moving assembly 2 and is inserted into the screw rod mounting seat 220 close to the rotating assembly 3, and the screw rod mounting seat 220 is fixed on the machine 100. The screw rod 22 is arranged along the X-axis direction of the machine 100 and is in threaded connection with the first base 111 of the knurling mechanism 11, so that the screw rod 22 rotates after the servo motor 21 is started, and the knurling assembly 1 is driven to reciprocate on the screw rod 22; during the movement of the knurling assembly 1, the lifting cylinder 1131 drives the knurling wheel to move downwards and contact with the surface of the round bar type workpiece, so as to process the surface of the round bar type workpiece.

The machine 100 is further provided with a centering piece 4, the centering piece 4 is disposed on the second base 40, the screw rod 22 penetrates through the second base 40, and the second base 40 is fixed on the machine 100. The centering member 4 is located at the front end of the servomotor 21, i.e. the centering member 4 is closer to the knurling mechanism 11 with respect to the servomotor 21. The centering member 4 comprises a cylinder 41 and a positioning head 42 provided at the free end of the cylinder 41. Of course, the cylinder 41 may be replaced by other parts capable of producing a linear movement as disclosed in the prior art, but a cylinder is preferably used in the present utility model. The positioning head 42 is driven by the cylinder 41 to move along the X-axis direction and contact with one end of the round rod-shaped workpiece, so as to always generate pressure on one end of the round rod-shaped workpiece, that is, the two are mutually abutted.

The other end of the knurling assembly 1 is provided with a rotating assembly 3, and the rotating assembly 3 comprises a spindle head 31 for clamping and driving a round rod type workpiece to rotate. The spindle head 31 is fixed to a spindle head mount. The round bar-type workpiece clamped by the spindle head 31 passes through the two knurling mechanisms 11 with only rotational movement, and a portion to be machined of the round bar-type workpiece is placed on the support base 112 in the knurling mechanism 11. The positioning head 42 is coaxially disposed with the spindle head 31, that is, the positioning head 42 is coaxially disposed with the round bar-type work piece. After the positioning head 42 contacts with one end of the round rod workpiece, the positioning head 42 is abutted against the round rod workpiece which is axially fixed in cooperation with the spindle head 31.

The rotating assembly 3 further comprises a host motor 32 positioned above the spindle head 31, the host motor 32 is connected with the spindle head 31 through a conveying belt 33, and the conveying belt 33 is positioned at one end of the spindle head 31 away from the round rod type workpiece. The rotation speed between the main motor and the spindle head 31 is regulated by the conveyor belt 33, i.e. the conveyor belt 33 plays a role in deceleration. Of course, the connection mode between the main motor 32 and the spindle head 31 is not unique, and in the present utility model, a transmission connection is preferably adopted, and in addition, since other connection modes are all the prior art, the description thereof will be omitted. As shown in fig. 2, the main motor 32 is fixedly disposed on a main motor mounting seat, and the main motor mounting seat is located between the spindle head 31 and the main motor 32 and is fixedly connected with the spindle head mounting seat. The central axis of the spindle head 31 is located above the recess 1120 of the support 112. The shortest distance between the axis of the central axis of the spindle head 31 and the groove 1120 is the radius of the round bar workpiece. The central axis of the spindle head 31 is located above the screw 22, and an organ cover (not shown) is sleeved on the outer periphery of the screw 22 in order to prevent the waste from falling onto the screw 22 and affecting the movement of the knurling mechanism 11, because the waste is inevitably generated during the processing.

The working process of the utility model is briefly described below:

s1: inserting a round rod type workpiece into the central shaft of a main shaft head 31, and clamping by the main shaft head 31;

s2: activating the cylinder 41 to enable the positioning head 42 to be abutted with the free end of the round rod type workpiece;

s3: adjusting the distance between two adjacent knurling mechanisms 11 according to the processing requirement, installing limiting plates 121 with the compound requirement between the two adjacent knurling mechanisms 11, and fixing the distance between the two adjacent knurling mechanisms 11 by using pulling plates 122;

s4: starting a lifting cylinder 1131, and driving a hob 1141 to contact with the surface of the round rod type workpiece;

s5: simultaneously starting a servo motor 21 and a host motor 32, wherein the servo motor 21 drives the knurling mechanism 11 to reciprocate along the arrangement direction of the screw rod 22, and the host motor 32 drives the round rod type workpiece to rotate;

s6: the hob 1141 and the supporting seat bearing are driven to rotate when the round rod type workpiece rotates, and the hob 1141 processes the surface of the round rod type workpiece until the length to be processed is completely processed;

s7: the lifting cylinder 1131, the servo motor 21 and the main motor 32 are sequentially reset.

The utility model has various embodiments, and all technical schemes formed by equivalent transformation or equivalent transformation fall within the protection scope of the utility model.

Claims

1. Servo knurling machine, its characterized in that: comprising

A machine (100),

a knurling assembly (1) movably arranged on the machine table (100) and comprising two knurling mechanisms (11) and an adjusting mechanism (12) for adjusting the distance between the two knurling mechanisms (11), wherein the adjusting mechanism (12) limits the distance between the two knurling mechanisms (11) to be equal to half of the length of a workpiece to be processed;

the moving assembly (2) is positioned at one end of the knurling assembly (1) and comprises a servo motor (21) fixed on the machine table (100) and a screw rod (22) driven by the servo motor (21) to rotate, and the screw rod (22) is arranged along the X-axis direction of the machine table (100) and is in threaded connection with a first base (111) of the knurling mechanism (11) so as to drive the knurling assembly (1) to reciprocate;

the rotating assembly (3) is positioned at the other end of the knurling assembly (1) and comprises a main shaft head (31) used for clamping a round rod type workpiece and driving the round rod type workpiece to rotate, the round rod type workpiece clamped by the main shaft head (31) passes through the two knurling mechanisms (11) and has only rotary motion, and the round rod type workpiece is placed on the knurling mechanisms (11).

2. The servo knurling machine of claim 1, wherein: the knurling mechanism (11) further comprises a supporting seat (112) fixed on the first base (111), the top of the supporting seat (112) is recessed downwards to form an arc-shaped groove (1120), and the radian of the groove (1120) is consistent with the radian of the periphery of the round rod-shaped workpiece.

3. The servo knurling machine of claim 2, wherein: two support bearings (1121) which are arranged in parallel along the Y-axis direction are inserted on the support base (112), and the support bearings (1121) are positioned on two sides of the groove (1120); the round bar-type workpiece is located between the outer walls of the two support bearings (1121).

4. A servo knurling machine as in claim 3, wherein: the knurling mechanism (11) further comprises a lifting cylinder (1131) arranged above the supporting seat (112), and a cutter holder (114) for mounting a hob (1141) is fixed on a cylinder shaft of the lifting cylinder (1131); the free end of hobbing cutter (1141) is provided with two knurl wheels along Y axle direction parallel arrangement, the round bar type work piece is located two between the outer wall of knurl wheel, two the knurl wheel is simultaneously right the tangential force is applyed to round bar type work piece, and two tangential forces counteract each other.

5. The servo knurling machine of claim 4, wherein: the first base (111) is further provided with an air cylinder mounting seat (113), the lifting air cylinder (1131) is fixed on the air cylinder mounting seat (113), and the air cylinder mounting seat (113) is located on one side of the supporting seat (112).

6. The servo knurling machine of claim 5, wherein: the machine table (100) is further provided with a centering piece (4), the centering piece (4) comprises a cylinder (41) and a positioning head (42) arranged at the free end of the cylinder (41), the positioning head (42) is coaxially arranged with the spindle head (31), and can always generate pressure to one end of a round rod type workpiece after moving along the X-axis direction, and then is in butt joint with the round rod type workpiece which is axially fixed in cooperation with the spindle head (31).

7. The servo knurling machine of claim 6, wherein: the centering piece (4) is arranged on the second base (40), the screw rod (22) penetrates through the second base (40), and the second base (40) is fixed on the machine table (100).

8. The servo knurling machine of claim 7, wherein: the screw rod (22) penetrates through a screw rod mounting seat (220) close to the moving assembly (2) and is inserted into the screw rod mounting seat (220) close to the rotating assembly (3).

9. The servo knurling machine of claim 8, wherein: the adjusting mechanism (12) comprises a limiting plate (121) and a pulling plate (122); the limiting plate (121) is inserted between the two first bases (111) to limit the distance between the two knurling mechanisms (11) and synchronously move with the two knurling mechanisms (11); one end of the pull plate (122) is connected with one of the movable plates (102) corresponding to the first base (111) through bolts, a waist-shaped hole (1220) is formed in the other end of the pull plate (122), and the bolts penetrate through the waist-shaped hole (1220) and are fixedly connected with the other movable plate (102) corresponding to the first base (111).

10. The servo knurling machine of claim 9, wherein: a main motor (32) is fixed above the main shaft head (31), and the main motor (32) is connected with the main shaft head (31) through a conveying belt (33); the central shaft of the main shaft head (31) is positioned above the screw rod (22), and the central shaft of the main shaft head (31) is positioned above the groove (1120) of the supporting seat (112).